Disazo dye



" erally with a Patented Aug. 5, 1924.

. 'wnammr AND mm. ms run-mun, GERMANY, essmnoa TO 00., or mmaxusnn, nma COLOGNE-ON-THE-1=..-=.=

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To all whom it may concemr Be it known that we, Wnmm Nnan- .MEIER and KARL HnUsNm, citizens of Germany, residing at Leverkusen, near Cologne- 5 on-the-Rhine, von Biittingerstrasse 19 and Karl Rumpfstrasse 25, in the State of Prussia, Germany, have invented new and use-' ful Improvements in a Disazo Dye, of which the following is a specification.

a can be obtained by combining the diazocompounds of monoacid ldiaminophenolethers OR:NH :NH aci yl=1:5:2) with a mid le component of the naphthelene series, e. g. l-naphthylamine-G- orY-sulfonic acid or a mixture thereof, 1.2-aminonaphtholalkylether-G-sul onic acid, rediazotizing, combining the minoazocompoundswith a naphthol sulfonic acid, e. g. l-naphthol-3- or 4- or 2-naphthol- 6- or 7 -sulfonic acid and splitting ofi' the acidyl radicle.

The new pulverized in salts blackish powders soluble in water genbluish coloration and in concentrated' sulfuric acid generally with a green to blue coloration. U on treatment with sta nnous chlorid and hydrochloric acid the new dyes are split up into a 2.5-diaminol-phenolalkylether, a naphthylene diamine compound and an aminonaphthol sulfonic acid. They dye cotton blue shades which can be diazotlzed on fibre and developed to washing and to. light on being diazotized It has been found that valuable disaz'odyes dyes are after being dried and. the shape of their alkali metal j com Application filed April 14, 19 38. seljial No. 38,181.

with sodium-beta-naphtholate. Shades of excellent clearness and very good fastness to washing are thus obtained, a clear white is obtained sulfite.

In order to illustrate the'new process more fully the following example is given, the parts being by weight 180 parts of 5amino-2-acetylamino-l-anisol are dissolved in 5000 parts of water and 250 parts of hydrochloric acid (19 Be.) and diazotized with 69 parts of sodium nitrite. Theresulting d1azocompound is added to a solution'of 275 arts of l-amino- 2-naphtholmethylether-6-su fonate of sodium to which 250 arts of sodium acetate (100%) have been added. After some hours when discharging with hydro manna. 'na

the combination is complete. subsedlliently the mixture is rendered acid with drochloric acid and the aminoazodye is iazotized with 69 arts of sodium nitrite. The diazocompoun is then introduced at about zero into a solution of 246 parts of Lust hthol-4-sulfonate of sodium in water and 00 parts of carbonate of sodium. The dye is ltered oil, stirred up with 7000 parts of hot water and boiled during a quarter of an hour with 1400 parts of a 30 per cent caustic soda 1 e. After cooling the solution is neutra ized with hydrochloric acid and the dye is filtered ofi. It-has after being dried and ulverized in a free state most probably t e following'formula:

03E and developed with sodium na htholate. A

clear white is obtained when with hydrosulfite- 1. The herein described new azodyes obtainable by combinin the diazocompounds of a monoacidyldiammophenolether with a middle component of the naphthalene series, rediazotizing' and combining the resulting .aminoazocom ound with a na hthol sulfonic acid, w ch dyes are after being dried 'scharging it and pulverized in the shape oftheir alkali metal salts blackish powders soluble in water generally with a bluish colorization andin concentrated sulfuric acid generally with a green to blue coloration; being split up by treatment with stannous chlorid and hydrochloric acid into 2.5-diamino-1-phenola lether, a naphthylenediamine compound I an an aminonaphthol sulfonic acid; dyeing cotton blue shades which can be diazotized on fibre and developed with sodium-betanaphtholate, substantially as described.-

2. The herein described new azodye obtainable by combining the diazocompound of 5-amino-2-acetylamino-l-anisol with 1- amino 2 naphtholmethyletherf- 6 sulfonic I acid, rediazotizing, combining with l-naphthol-4-sulfonic acid and splitting ofl the want acetyl group, which dye is after being dried and pulverized in the shape of its sodium salt a black powder soluble in water with a greenish-blue and in concentrated sulfuric acid with a blue coloration; being split up upon treatment with stannous chlorid and hydrochloric acid into 2.5-diaminoanisol,

1.4 diamino 2 naphtholmethylether-6-sul- WILl-[ELM 'NEELMEIER, KARL HEUSNER, 

